{"id":"CVE-2026-30848","aliases":["BIT-parse-2026-30848","GHSA-hm3f-q6rw-m6wh"],"url":"https://o3.security/vulnerability/CVE-2026-30848","summary":"Parse Server: `PagesRouter` path traversal allows reading files outside configured pages directory","details":"### Impact\n\nThe `PagesRouter` static file serving route is vulnerable to a path traversal attack that allows unauthenticated reading of files outside the configured `pagesPath` directory. The boundary check uses a string prefix comparison without enforcing a directory separator boundary. An attacker can use path traversal sequences to access files in sibling directories whose names share the same prefix as the pages directory (e.g. `pages-secret` starts with `pages`).\n\nThis affects any Parse Server deployment with the `pages` feature enabled (`pages.enableRouter: true`). Exploitation requires a sibling directory of `pagesPath` whose name begins with the same string as the pages directory name.\n\n### Patches\n\nThe fix enforces a path separator boundary in the check, ensuring resolved paths must be strictly inside the `pagesPath` directory.\n\n### Workarounds\n\nEnsure the `pagesPath` directory has no sibling directories whose names begin with the same prefix. For example, if `pagesPath` is `/srv/pages`, ensure no directory like `/srv/pages-backup` or `/srv/pages_old` exists alongside it.\n\n### References\n\n- GitHub security advisory: https://github.com/parse-community/parse-server/security/advisories/GHSA-hm3f-q6rw-m6wh\n- Fix for Parse Server 9: https://github.com/parse-community/parse-server/releases/tag/9.5.0-alpha.8\n- Fix for Parse Server 8: https://github.com/parse-community/parse-server/releases/tag/8.6.8","published":"2026-03-07T16:20:22.220Z","modified":"2026-08-12T03:51:15.716928384Z","cvss":null,"epss":null,"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"npm","name":"parse-server","fixedVersion":"8.6.8"},{"ecosystem":"npm","name":"parse-server","fixedVersion":"9.5.0-alpha.8"}],"fix":null,"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/30xxx/CVE-2026-30848.json"},{"type":"ADVISORY","url":"https://github.com/parse-community/parse-server/security/advisories/GHSA-hm3f-q6rw-m6wh"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-30848"},{"type":"PACKAGE","url":"https://github.com/parse-community/parse-server"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:15.716928384Z"}}